File:Brachiopods in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Symmes Creek at Mollies Rock Road bridge, Muskingum County, Ohio, USA).jpg
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English: Brachiopods in fossiliferous limestone in the Pennsylvanian of Ohio, USA.
The Lower Mercer Limestone is a Middle Pennsylvanian-aged, laterally persistent, marine fossiliferous limestone unit in the Pottsville Group of eastern Ohio, USA. It is richly fossiliferous, principally dominated by brachiopods and crinoid stems. The fossils shown above are brachiopods, which are sessile, benthic, filter-feeding, marine invertebrates. They first appear in the Cambrian and are still alive in modern oceans. They all have two shells - most have shells of calcite (CaCO3 - calcium carbonate). Brachiopods dominated Paleozoic shallow seafloors. They were also fairly common in Mesozoic oceans. They are scarce in modern seas. Classification: Animalia, Brachiopoda, Articulata (a.k.a. Rhynchonelliformea) Locality: large talus block along the northern bank of Symmes Creek, just upstream of the North Fork/North Branch confluence & just upstream of the Mollies Rock Road bridge over Symmes Creek, Madison Township, northern Muskingum County, eastern Ohio, USA |
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| Source | https://www.flickr.com/photos/47445767@N05/23796700856/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/23796700856 (archive). It was reviewed on 4 March 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 16:25, 4 March 2020 | | 4,000 × 3,000 (4.6 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/23796700856/ with UploadWizard |
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